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  Electric Motors, Engines & Accessories > Components - R/C Engine > Prop Nuts / Prop Washers / Drive Washers - R/C Engine [View Top Sellers for this Category] Bookmark this Page

O.S. - OSMG7974 OSM73101010 73101010 531028604124 4531028604124
Manufacturer Stock#
A Closer Look at This Product
  Tech Notes

Parts Compatibility

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O.S. Long Prop Nut 1/4"-28
O.S. Long Prop Nut 1/4"-28
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Parts Saver Eligible:Yes

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  Special Savings When Buying in Quantities
Special Stock Number Units at this Price Tower's Low Price Click to Order Quantity Discount Savings
O.S. Long Prop Nut 1/4"-28 Add to Wish List
18.14  Buy Now .84  
O.S. Long Prop Nut 1/4"-28 Add to Wish List
27.06  Buy Now 1.41  
O.S. Long Prop Nut 1/4"-28 Add to Wish List
44.85  Buy Now 2.60  

Tech Notes
This is an Optional Long Prop Nut and Washer Set for the
O.S. Max .60FP, .65LA, .61FX, .91FX Engines.


Metal construction.
For use where an extra thick propeller boss (center) and/or spinner
backplate does not leave enough threads for a standard propeller
nut to tighten down onto the propeller. This nut has an extension
that goes through the propeller and then extends out past the end
of the crankshaft with a hex nut for tightening.
This also helps keep the propeller on the engine in the case of
backfiring or detonation.
This can also be used on most engines that have 5/16"- 24 threading.


One prop nut with 5/16"- 24 threading
One prop washer


9/16" opened end wrench (15mm is slightly too big)


Propeller Nut- Extension Outer Diameter: 9.6mm
Extension Length: 13mm
Overall Length: 20mm
Inner Threading: 5/16" x 24
Propeller Washer- Inner Diameter: 10mm
Outer Diameter: 28mm
dew 3/24/01

– If you need more information, use these O.S. resources –
Web Site:
Phone: 217-398-8970
  Postal Address:

Click here for Units of Measure Conversion Calculators

Parts Compatibility
Parts Compatibility for O.S. Long Prop Nut 1/4"-28
This item is an optional part for the following:
 LXAESD O.S. 65AX ABL w/Muffler  (Parts List)
 LXBY46 O.S. 61FX ABL w/Muffler  (Parts List)

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